is it wise to tell people to uninstall update 2919355?
per KB2919355,
"Important All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require this update to be installed. We recommend that you install this update on your Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2-based computer in order to receive continued future updates."
its safer to refer them to the KB article.
the KB article discusses some "Issues that occur after you install this update"
http://support.microsoft.com/kb/2919355/EN-US